Take-up mechanism for looms



I 2 Sheets-Sheet 1. 0. A. SAWYER & M. M. LAHUE.

TAKE-UP MECHANISM FOR I IOOMS. v N0. 506,264. Patented Oct. 10,1893.

(No Model.)

Wiiimasas lmvefikmsi MMFGW- (No Model.) 2 Sheets-Sheet '2.

0. A. SAWYER & M. M. LAHUE. TAKE-UP MEGHANISM FOB LOOMS. No. 506,264.Patented Oct. 10, 1893.

Wfimaams I Mwewkms;

UNITED STATES PATENT OFFICE.

ORREN A. SAWYER AND MOSES M. LAHUE, OF LOWELL, MASSACHUSETTS.

TAKE-UP MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 506,264, dated October10, 1893.

Application filed December 4, 1890- Serial No. 378,546. (No model.)

To all whom it may concern.-

Be it known that we, ORREN A. SAWYER and MOSES M. LAHUE, of Lowell, inthe county of Middlesex and State of Massachusetts, have invented a newand useful Improvement in Take- Up Mechanisms for Looms, of which thefollowing is'a specification.

Our improvement relates to take-up mechanisms for looms, and consists incertain new and useful constructions and combinations of the severalparts thereof substantially as hereinafter described and claimed.

In the drawings: Figure 1 is an end elevation of a portion of a loomshowing our invention applied thereto. Fig. 2 is a top plan view of aportion of Fig. 1, showing the mode of regulating the place of stoppingthe loom. Fig. 3 is an enlarged view of a portion of Fig. 1, showing theconstruction of the mechanism more distinctly. Fig. 4 is a top plan viewof a portion of the loom shown in Fig. 3. Fig. 5 is anend elevation ofthe part shown in Fig. 4.

A is the frame of the loom which supports the running parts.

1 is the warp beam, revolving on the shaft,

2, supported in the frame in the usual manner. A roller, 3, is locatedin the frame above the warp beam, over. which the dotted line 4 showsthe course of the warp leading from the warp beam to the breast beam, 5,of the 160m. Between the roller 3 and the breast beam 5, the warp iswoven into cloth and the continuation of the dotted line, 4, shows thecloth leading around the sand roll and cloth roll to the cloth beam, 6,around which it is rolled by the revolution of the latter on its axis 7.

The main shaft, 8, of the loom is driven by the pulley, 9, and operatesthe link, 10, by a crank upon it, which is attached to the lay, 11, andthe latter is supported upon the sword, 12, pivoted in the usual mannerat 13. The heddles and the reed and other parts of the loom connected tothe lay are omitted for the sake of clearness, as they form no part ofthe present invention. On the nearer end of the shaft 8 is attached thecam, 14, which is surrounded by the strap, 15, connected to the end ofthe pawl bar, 16, so that the latter is reciprocated back and forth bythe revolution of the main shaft. The handle and is of inferior quality.

end of the pawl bar carries the pawl, 17, which works into the ratchetteeth, 18, of the wheel 19. The latter is supported upon the shaft, 20,which is journaledin the side of the loom frame and has on its inner endthe gear wheel, 21. A stop pawl, 22, is pivoted to the side of the loomframe on the stud, 23, and serves to hold the gear wheel, 19, in placewhile the pawl 17 is moving forward over it to take up another notch.The pawlbar, 16, is formed in the shape of an open loop passing on eachside of the gear wheel, 19, where it is carried by the same beforereaching the pawl 17 and this serves to guide it in its directreciprocal motion to and fro. A stud, 24, in the frame supports thepinion, 25, which meshes into the pinion, 26, on the end of the sandroll, 27, and the latter rolls against the surface of the cloth roll,28, revolving the latter with it by friction.

The cloth beam, 6, is revolved by the belt, 29, (shown in dotted linesin Fig. 1) connecting a pulley on its farther end with one on thefarther end of the sand roll. All these parts are of the usualconstruction and the reciprocation of the pawl bar, 16, longitudinallyserves to take up and draw forward one of the notches, 18, at eachrevolution of the main shaft, 8, in the usual manner, thus taking up andwinding the cloth upon the cloth beam, 6, as it is woven by the loom. Itis the habit of some weavers while the loom is running, to turn theratchet wheel 19 by hand at intervals, so as to make the takeupmechanism take up the cloth faster than the normal speed of it, thusmaking the loom turn out more cloth per day, although the cloth where sotaken up faster is turned out without the proper number of picks perinch The weaver is thus benefitted at the expense of the manufacturer,as he is usually paid by the piece, or amount woven. Our improvementsare intended to prevent this being done, and are based upon the factthat this abnormal moving of ratchet it difiicult of detection withoutcounting all the picks in the cloth, which is practically impossible.\Vhen the ratchet wheel, 19, is abnormally turned while the loom isstanding still, however, the space where the pick is wanting in thecloth is immediately visible, as the less number of picks are not evenlydistributed over the given space.

To prevent the ratchet wheel 19 from being abnormally moved while theloom is running, it is only necessary to prevent the pawl 17 from beinglifted clear of the teeth, 18, of the wheel 19, since the pawl must belifted over each notch to allow the wheel to be so turned by hand. We,therefore, attach to the loom frame the stop, 30, so located above thefree end of the pawl bar, 16, that any attempt to lift the pawl barwhile the loom is running will bring it against the stop before the pawlhas been lifted out of the notches 18. As the pawl bar must lift itselfover each notch 18 to take up the next one, however, provision must bemade for this, but the extreme lifting of the pawl bar occurs at thefarthest point of its reach to take up the next notch 18 of wheel, 19.We, therefore, provide a shoulder, 31, on the side of the pawl bar,which passes under the stop, this projection being so graduated as toallow the pawl bar to lift over the notch 18 at this extreme point ofits normal motion in the running of the loom, but if the pawl bar beattempted to be lifted at any other point of its reciprocation, theshoulder 31 comes against the lower side of the stop, 30, and preventsit.

While it is theoretically possible for the operator of the loom to turnthe ratchet wheel 19 an extra tooth at the precise instant when theposition of the shoulder, 31, allows the pawl bar to be lifted over theteeth, yet, as the loom runs from sixty to one hundred and twenty picksper minute and the main shaft 8 makes that number of revolutions, theentire reciprocation of the pawl bar 16 to and fro occupies betweenone-half a second and a second of time, and the fraction of this atwhich the wheel 19 can be turned the extra tooth is too slight to renderit practicable to do so without carrying the square side of the shoulder31 against the stop, 30, and breaking it, thus exposing the attempt.

When the loom is stopped it is often necessary for the operator to slackoff the cloth take-up mechanism, by turning the wheel 19 by hand. Thisrequires, with our present invention, that the loom should be stoppedwhen the'pawl bar, 16, is at the farthest position in taking up, shownin Figs. 1 and 3, at which position the pawl bar may be freely lifted,because the shoulder 31 will pass by the stop 30. While the operator canstop the loom at this point, we have found it more convenient to attachan eye, 32, to the lay and a pivoted hook, 33, to the breast beam,arranged of the proper length to hook into the eye 32 and bring the lay,the driving shaft 8 and the reciprocating pawl bar, 10, to the properposition to enable the pawl to be lifted out of the teeth, 18, as beforedescribed.

What we claim as new and of our invention is- The combination, in a loomtake-up mechanism, of the reciprocating pawl bar, 16, provided with thepawl, 17, and the shoulder, 31, the ratchet wheel 19, provided withratchet teeth, 18, and the stop, 30, located in position to arrest theraising of the pawl bar 16, ex cept during the farther part of itsmovement in taking up, substantially as described.

ORREN A. SAVVYER. MOSES M. LAHUE.

Witnesses:

GEORGE W. Poonn, JOHN W. PEARL.

